ansible/postgresql_db

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
try:
import psycopg2
except ImportError:
postgresqldb_found = False
else:
postgresqldb_found = True
# ===========================================
# PostgreSQL module specific support methods.
#
def db_exists(cursor, db):
query = "SELECT * FROM pg_database WHERE datname=%(db)s"
cursor.execute(query, {'db': db})
return cursor.rowcount == 1
def db_delete(cursor, db):
query = "DROP DATABASE %s" % db
cursor.execute(query)
return True
def db_create(cursor, db, owner, template, encoding):
if owner:
owner = " OWNER %s" % owner
if template:
template = " TEMPLATE %s" % template
if encoding:
encoding = " ENCODING '%s'" % encoding
query = "CREATE DATABASE %s%s%s%s" % (db, owner, template, encoding)
cursor.execute(query)
return True
# ===========================================
# Module execution.
#
def main():
module = AnsibleModule(
argument_spec=dict(
login_user=dict(default="postgres"),
login_password=dict(default=""),
login_host=dict(default=""),
db=dict(required=True, aliases=['name']),
owner=dict(default=""),
template=dict(default=""),
encoding=dict(default=""),
state=dict(default="present", choices=["absent", "present"]),
)
)
if not postgresqldb_found:
module.fail_json(msg="the python psycopg2 module is required")
db = module.params["db"]
owner = module.params["owner"]
template = module.params["template"]
encoding = module.params["encoding"]
state = module.params["state"]
changed = False
# To use defaults values, keyword arguments must be absent, so
# check which values are empty and don't include in the **kw
# dictionary
params_map = {
"login_host":"host",
"login_user":"user",
"login_password":"password"
}
kw = dict( (params_map[k], v) for (k, v) in module.params.iteritems()
if k in params_map and v != '' )
try:
db_connection = psycopg2.connect(database="template1", **kw)
# Enable autocommit so we can create databases
db_connection.autocommit = True
cursor = db_connection.cursor()
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except Exception, e:
module.fail_json(msg="unable to connect to database: %s" % e)
try:
if db_exists(cursor, db):
if state == "absent":
changed = db_delete(cursor, db)
else:
if state == "present":
changed = db_create(cursor, db, owner, template, encoding)
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except Exception, e:
module.fail_json(msg="Database query failed: %s" % e)
module.exit_json(changed=changed, db=db)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()